well actually the selected tracks and selected subtitles do get reset when you go to the next title. for example if your downconverting an anime with english DUB and want to Remove subtitles Completely. you will have to go into the subtitle tab for each title and delete the track or once you que title 2 it will automatically add the first subtitle track it detects.
also with dual audio the language for the audio track will alwas default to the one track that matches your prefered language.
but what would save alot of time would just be a global setting to keep all tracks
if you just doing something simple like changing the resolution of an encoding there is no reason to even be messing with the other tracks they should all just be kept